Triple LNB for 4 Receivers (combine signals?)

[hurrican]

Hi everyone,
I have a 18x20 phase III dish (4 outputs) with triple lnb w/ built in multiswitch, what i'm trying to figure out - is there a way to combine the signal so it could all be used over one or two pieces of coax, then use another multiswitch to uncombine the signal?

These are just standard receivers without HD capability. The 4 receivers will be in very close proximity to each other in the same room, I just don't want to have to run 4 seperate cables to each receiver.

I'm thinking that since the multiswitch is built directly into the LNB, that this should be doable?

Any help would be greatly appreciated!

[RobertE]

Hi everyone,
I have a 18x20 phase III dish (4 outputs) with triple lnb w/ built in multiswitch, what i'm trying to figure out - is there a way to combine the signal so it could all be used over one or two pieces of coax, then use another multiswitch to uncombine the signal?

These are just standard receivers without HD capability. The 4 receivers will be in very close proximity to each other in the same room, I just don't want to have to run 4 seperate cables to each receiver.

I'm thinking that since the multiswitch is built directly into the LNB, that this should be doable?

Any help would be greatly appreciated!

Short answer: No

Long answer: Yes, if you use a external SWM switch and have a compatible reciever. H20/HR20/D12/R16 or higher.

[veryoldschool]

yes, but not cheaply.
It is called "stacking" and for "a few hunderd dollars" you can do it.
http://www.solidsignal.com/prod_display.asp?PROD=SUS575-T
and
http://www.solidsignal.com/prod_display.asp?PROD=SS212

[hurrican]

Thanks both for the quick replies! Money will not be an issue, as I have some leftover money in my budget to get this accomplished.

So, to make sure i'm understanding this correctly..


I will need to purchase ( the 2nd link you gave me - discontinued? ) DIRECTV Phase III Stacker/DStacker for SAT A,B,C plus Off-Air Antenna

Once the single cable comes into my building, can I use the stacked input signal into the demuxer, and the 2 lines come out into a 1x4 multiswitch?

Thanks very much for your assistance!

[jdspencer]

I knew I saw this asked elsewhere :)
http://www.satelliteguys.us/directv-forum/135990-triple-lnb-4-receivers-combine-signals.html

[carl6]

Long answer:

The coax between the receiver and the dish is a 2-way communication link. There are four possible signalling combinations the receiver sends to the dish, and there are four possible sets of transponder signals the dish then sends back to the receiver based on that request.

If you wire directly from the dish to a receiver, then all four dish outputs are equally capable of providing the proper signal.

If you use an external multiswitch, then without stacking, you must have all four coax lines connected between the dish and an external multiswitch. That allows all four possible sets of signals to be present at the inputs to the multiswitch at all times. Then, no matter which signal the receiver requests, the multiswitch can provide it.

With only one satellite (101), there are only two signal combinations and two sets of transponder signals, so stacking is relatively easy. All of the even transponders are shifted in frequency then placed on the same coax "on top of" the odd tranponders. Destacking reverses that and puts them back where they belong. This lets you feed multiple SD receivers from a single coax feed that can be split and routed to multiple locations, but you need destacking equipment at each receiver location.

When you move up to a multi-satellite dish, the 3-LNB Phase III dish, you must deal with the four signalling combinations, and stacking becomes more complicated, and more costly. You still need destacking equipment at each receiver location, which causes the price to go up pretty rapidly.

Your two best solutions are either to run coax as needed, or to replace all of your receivers/DVRs with SWM compatible equipment and use SWM technology. The only equipment that works with SWM are the HR20, HR21, H21, R16, D12, R22 and some H20 receivers. No older equipment will accept the SWM signal.

Running coax would require you to identify a central location. Run four coax from the dish to the central location, where you will place your multiswitch. Then run two coax from there to each DVR location, and one coax to each non-DVR receiver.

Carl

[dave29]

I knew I saw this asked elsewhere :)
http://www.satelliteguys.us/directv-forum/135990-triple-lnb-4-receivers-combine-signals.html

i see that alot. sometimes on up to 4 sites:lol:
anyway...... this is the best place for [correct] advice:p